These light blue 30 and 50 lb,cylinders feature "Y" valve for liquid/vapor,400 psi rating,and 3/4" plug for a float switch. These light blue 30 and 50 lb,cylinders feature "Y" valve for liquid/vapor,400 psi rating,and 3/4" plug for a float switch. ITEM#Description A30 lb.R-410a cylinder 400 psi B 50 lb.R-410a cylinder 400 psi LONG TERM IS ONE OF THE LEADING COMPANY SPECIALIZED IN HVAC AND LOW ...